一种分簇Ad Hoc网络场景下的路由发现方案

A Route Discovery Scheme of Clustering Ad Hoc under Network Scenario

针对分簇结构Ad Hoc网络场景下的路由问题,提出一种基于接收信号强度(RSSI)和邻居先验信息的按需路由发现方案。该方案根据网络的分簇特点,在路由发现RREQ广播中,考虑节点间RSSI和中继节点业务负载情况,引入随机延时退避转发机制,综合判断是否转发RREQ报文,以解决场景中"广播风暴"引起的路由开销问题、优化路由发现的质量。仿真结果表明,与CBRP协议路由发现的性能相比,该方案大大降低了路由发现过程中控制包的开销,缩短了路由发现的时延,总体提高了网络性能。

A scheme of reactive route discovery is proposed based on RSSI and neighbor priori-knowledge, aiming at routing problem of the clustering Ad Hoc scenario. Based on cluster network feature,this scheme considers the RSSI between nodes and traffic-load of relay nodes during RREQ broadcast, and introduces the delay back-off forwarding mechanism to comprehensively determine whether to for- ward RREQ packet, solving the routing overhead problem caused by broadcast storm and optimizing performance of route discovery. Sim- ulation results show that compared with performance of protocol CBRP, the scheme significantly reduces the route discovery control over- head and shortens the discovery delay, improving overall network performance.